資訊專欄INFORMATION COLUMN
摘要：本來是想直接深入到的核心層去看的，但是發(fā)現(xiàn)其實(shí)上面的部分還有好些沒有分析到，因此回來繼續(xù)分析。另外一個(gè)，是專用于統(tǒng)計(jì)的，我們暫時(shí)不去關(guān)注。具體的內(nèi)容我會(huì)在后面的核心層分析的時(shí)候指出。準(zhǔn)備下一篇進(jìn)行的核心層分析吧。
本來是想直接深入到mars的核心層去看的，但是發(fā)現(xiàn)其實(shí)上面的samples部分還有好些沒有分析到，因此回來繼續(xù)分析。
ConversationActivity這個(gè)類中實(shí)際上還做了很多的工作，在onCreate中：
final MainService mainService = new MainService();
MarsServiceProxy.setOnPushMessageListener(BaseConstants.CGIHISTORY_CMDID, mainService);
MarsServiceProxy.setOnPushMessageListener(BaseConstants.CONNSTATUS_CMDID, mainService);
MarsServiceProxy.setOnPushMessageListener(BaseConstants.FLOW_CMDID, mainService);
MarsServiceProxy.setOnPushMessageListener(BaseConstants.PUSHMSG_CMDID, mainService);
MarsServiceProxy.setOnPushMessageListener(BaseConstants.SDTRESULT_CMDID, mainService);
這里出現(xiàn)了一個(gè)MainService，我們來看看：
/mars-master/samples/android/marsSampleChat/app/src/main/java/com/tencent/mars/sample/core/MainService.java
public class MainService implements PushMessageHandler {
public static String TAG = "Mars.Sample.MainService";
private Thread recvThread;
private LinkedBlockingQueue pushMessages = new LinkedBlockingQueue<>();
private BusinessHandler[] handlers = new BusinessHandler[]{
new MessageHandler(),
new StatisticHandler()
};
public MainService() {
this.start();
}
public void start() {
if (recvThread == null) {
recvThread = new Thread(pushReceiver, "PUSH-RECEIVER");
recvThread.start();
}
}
private final Runnable pushReceiver = new Runnable() {
@Override
public void run() {
while (true) {
try {
PushMessage pushMessage = pushMessages.take();
if (pushMessage != null) {
for (BusinessHandler handler : handlers) {
if (handler.handleRecvMessage(pushMessage)) {
break;
}
}
}
} catch (InterruptedException e) {
e.printStackTrace();
try {
Thread.sleep(500);
} catch (InterruptedException e1) {
//
}
}
}
}
};
@Override
public void process(PushMessage message) {
pushMessages.offer(message);
}
}
1.啟動(dòng)了一個(gè)接受者線程pushReceiver； 2.pushReceiver從LinkedBlockingQueue的pushMessages中不斷獲取message，然后通知到handlers的每個(gè)成員中，handlers是這樣定義的：
private BusinessHandler[] handlers = new BusinessHandler[]{
new MessageHandler(),
new StatisticHandler()
};
繼續(xù)往下看MessageHandler： /mars-master/samples/android/marsSampleChat/app/src/main/java/com/tencent/mars/sample/core/MessageHandler.java
public class MessageHandler extends BusinessHandler{
public static String TAG = MessageHandler.class.getSimpleName();
@Override
public boolean handleRecvMessage(PushMessage pushMessage) {
switch (pushMessage.cmdId) {
case Constants.PUSHCMD:
{
try {
Messagepush.MessagePush message = Messagepush.MessagePush.parseFrom(pushMessage.buffer);
Intent intent = new Intent();
intent.setAction(Constants.PUSHACTION);
intent.putExtra("msgfrom", message.from);
intent.putExtra("msgcontent", message.content);
intent.putExtra("msgtopic", message.topic);
SampleApplicaton.getContext().sendBroadcast(intent);
} catch (InvalidProtocolBufferNanoException e) {
Log.e(TAG, "%s", e.toString());
}
}
return true;
default:
break;
}
return false;
}
}
如果是Constants.PUSHCMD類型的message，那么就發(fā)送一個(gè)廣播。這個(gè)廣播實(shí)際上會(huì)由Mars核心部分接收到，但是傳遞的intent參數(shù)其實(shí)沒有意義，核心部分只是根據(jù)每次的pushcmd進(jìn)行網(wǎng)絡(luò)狀態(tài)的檢查而已，這些后話我們?cè)诜治龊诵牡臅r(shí)候再說。
另外一個(gè)StatisticHandler，是專用于統(tǒng)計(jì)的，我們暫時(shí)不去關(guān)注。
讓我們回到ConversationActivity，在MainService的new之后，會(huì)調(diào)用MarsServiceProxy.setOnPushMessageListener多次，設(shè)置監(jiān)聽，我們來看看MarsServiceProxy里面如何運(yùn)轉(zhuǎn)：
public static void setOnPushMessageListener(int cmdId, PushMessageHandler pushMessageHandler) {
if (pushMessageHandler == null) {
inst.pushMessageHandlerHashMap.remove(cmdId);
} else {
inst.pushMessageHandlerHashMap.put(cmdId, pushMessageHandler);
}
}
添加了監(jiān)聽到一個(gè)支持高并發(fā)的hashmap中：
